Rod-packing.



J. C. CHURCH.

ROD PACKING. API LIOATION FILED JAN. 3, 1911.

Lgfw, Patented Ummm.

C y 'a n w um@ 'To all whom, it' 'may concern:

lllilllllflF @time it@ (IGEL C. CHURCH, OF LDS ANGELES, CALFORNXA.

non-recante.

speciscauon of tettersratent.

Application filed January 3, 1911. Serial No. 606,637.

invention, and referring thereto:

Figure l is a longitudinal section of a stulngV box yand rod showing thepacking in place therein. Fig. 2 is an enlarged sectional view of aportion of the packing. Fig. 3 is a side elevation ofthe blank for thepacking 'ring before it is bentto shape. Fig. 4t is a side elevation ofthe packing ring. F ig. 5 is a plan of a portion of the packing adjacenttothe joint. Fig. 6 is a perspective of a Wedging ring for the packing.

Referring to Fig. l, the rod l, which may be a piston rod, Works throughthe stalling box, comprising a cylindrical chamber 2 and packing meanscompressed Within said chamber by the action of gland 3 operatedby'screw means, d. The inner ends of the chamber and of the gland arebeveled to produce a Wedging action on the packing.

The packing means comprises a series or plurality of rings 5, each ringbeing formed of' a section of tubing, consisting of suitableantifriction metal, bent in annular shape With the ends 6 of the tubebrought together to form a closed ring, said ends of the tubular sectionbeing preferably out obliquely or diagonally to the axis of the tube togive a ivedging joint. 'llhe tube is cut at one side as shown in Figa 3with a series of slits 7 which extendv from one side of the tube nearlyto the other side thereof so as to form openings extending through thewall of the tube from the inside to the outsideI of the tube and arepreferably directed in planes oblique to the axis of the tube, saidslits and the ends of' the tube being, for example, cut parallel to oneanother when the tube is in straight condition, as shown in Fig. 3. Thebore of the tube is lilled with a more or less plastic antifrict-ion andpacking material 8 consisting, for example, of graphite mixed with,finely divided antjlfriction metal, for example, the metal. which hasbeen removed to form the slits 7, this ant-ifriction filling lfor thering being forced into the ring in such manner as to occupy the bore 8and the slits 7 and to extend flush With the surface of the tube, "thesaid slits permitting the packing material toy exude or pass from theinterior of the tub`e to the outside thereof. The tube so formed is thenbent into annular shape With the slits on the inside, as abovedescribed, and a series of such tubes is slipped into the chamber 2 ofthe stuiling box, said tubes extending side by sidefa'ndfin Contact withone another and being ofijsulli- -cient size to make contact on theirouter faces With the inner Wall of the 'li'amber 2 and on their innerfaces with tha/,rod l, the tightness of Contact being determib'edby thePatented @et il?, i911.

pressure exerted on the tubes by the gland 3,

it'being understood that such pressure will cause more or lessdeformation of the packing rings, thereby increasing tliliir superficialcontact with the stuiling box chamber and the rod. When the rings aresoiplaced,l

the plastic packing material 8 therein is brought into contact with therod l serving as lubricating packing. The oblique orV diagonalarrangement of the slits 7 and the joint 6 insures complete closure bythe series of packing rings, as it prevents a formation of anycontinuous channel from' one endv of the series to the other, such asmight oc,- cur with slits extending straight across. This oblique ordiagonal arrangement of the slits and joint also gives a wedging actionby theV pressurefrom the cylinder orl when the parts are undercompression by the gland 8, such Wedging action further insuringtightness of the joints between the several parts.

It' desired, auxiliary Wedging means may be.

provided consisting of rings 10, see Fig. 6, said rings being beveledontheirend faces, as shown at l1, so as to fit between the 'outerportions of the rings 5 and produce a'wedg ing action thereon, the outerfaces of said rings 12 fitting Within chamber 2 and said ringsbeingformed of strips bent into annular-'shape with the ends 13obliquely or diagonally directed so as 'to give a Wedging joint. Anydesired number of these Wedging rings may be interposed in the series ofpacking rings.

l What l claim is:

l.' A rod packing comprising` a series of rings, each rin frictioninetalslitted from the inside of the ring and having its ends abuttingtogether,

formed of a tube of antithe ends of the t-ubes being obliqu'ely Acut togive e Wedge joint, and packing material in l said tubes and extendingin said slits, sind slits extending through the wall of the tube t0enable the packing material to puss frpln the inside to the outside ofthe tube.

2. A rod packing comprising a series of rings, each ring formed of atube of antifriction metal slitted from the inside of thev ring andhaving its ends abuttingtogether,

the ends of the tubes being obliquely cut to give a Wedge joint, andpacking material in seid tubes and extending in said slits, said slitsbeing obliquely directed with reference tov the axis of the tube andextending i through the Wall of the tube from the inside nearly to theouter side of the ring. v

Apaeking ring element consisting of e 4 packing material in said tubesand extending'in said slits, said slits being obliquely directed withreference to' the axis ofthe. tube and extending through the Wall of thetube from the inside of the ring nearly to the outside thereof.

. In testimony whereof, I have hereunto set my hand at' Los Angeles,California, this 30 23rd day ofDecember 1910.`

JOEL C. CHURCH.v

In presence (if- ARTHUR P. KNIGHT, FRANK L. A. GRAHAM.

